Form 3 Science Quiz Chapter 6

A ( ) energy source is a source of energy where supply is continuous and not deplete.

• renewable

• non-renewable

A ( ) energy source is a source of energy where supply is cannot be replaced and will deplete.

• renewable

• non-renewable

A generator is a device used to generate electricity.

• True

• False

The example of devices that use direct current are :

• calculator

• bread toater

• torchlight

• hair dryer

The example of devices that use alternating current are :

• calculator

• bread toater

• torchlight

• hair dryer

The primary coil on ( ) has less number of turns than its secondary coil.

• step-up transformer

• step-down transformer

The primary coil on ( ) has more number of turns than its secondary coil.

• step-up transformer

• step-down transformer

The primary and secondary coils of transformer each have 600 and 1800 number of turns respectively.

The primary coil is connected to supply of 230 V alternating current. What is the voltage output of the transformer?

• 690 V

• 460 V

• 780 V

• 810 V

Given : Input voltage = 240 and output voltage = 120 V, the number of turns of secondary coils is 20 coils.

The number of turns of primary coils.

• 60

• 40

• 50

• 80

The functions of fuse:

• Breaks the circuit

• Carries leakage electric current to Earth

• Melts when the current flow through it exceeds the fuse value

• Carries current from hometo section substation